Dams and hydropower projects on Arunachal Pradesh rivers can raise concerns about:

The correct answer is: d) All of the above

Dams and hydropower projects on Arunachal Pradesh rivers can raise concerns about:

• Environmental impact: Dams can have a significant impact on the environment, including changes in water flow, sediment transport, and water quality. They can also impact fish and other aquatic life, as well as wildlife that relies on rivers for habitat.
• Downstream flow effects: Dams can reduce the amount of water flowing downstream, which can impact agriculture, fisheries, and other water-dependent activities. They can also increase the risk of flooding downstream, as the water that is stored behind the dam is released suddenly during periods of high rainfall.
• Displacement of communities: Dams often require the relocation of people who live in the area where the dam is being built. This can be a disruptive and difficult process, and it can have a significant impact on the lives of those who are displaced.

In addition to these concerns, dams and hydropower projects can also have a number of other impacts, such as social and economic impacts, and impacts on cultural heritage. It is important to carefully consider all of these impacts before deciding whether or not to build a dam.